Charles w



' (No Model.)

0. W. W; BALL. LOOK FOR scmaw' STUDS.

NrTn iili STATES CHARLES W. W. BALL, OF NEW YORK, N. Y.

LOOK FOR SCREW-STUDS.

STPECIFICATION forming part of Letters Patent No. 543,975, dated August6, 1895.

Application filed April 15, 1895.

To all whom it may concern.-

Be it known that 1, CHARLES W. W. BALL, a citizen of the United States,and a resident of the city of New York, in the county of New York andState of New York, have invented certain new and useful Improvements inLooks for Screw-Studs, of which the following is a specification.

The object of my invention is to provide a new and improved lock forscrew-studs, which is simple in construction, can readily be applied onand removed from screw-studs of all kinds, and which holds the studfirmly and securely and prevents pickpockets from unscrewing the stud orpulling it out.

The invention consists in a lock formed of two shanks mounted'to swingin substantially parallel planes, each shank being provided with a notchin its inner edge at about half its length.

The-invention also consists in details of construction, as will be fullydescribed hereinafter, and'finally pointed out in the claims.

In the accompanying drawings, forming a part of this specification, andin which like letters of reference indicatelike parts in all the'views,Figure l is a plan view of my improved lock for screw-studs, the samebeing shown opened. Fig. 2 is a similar view of the same partly closed.Fig. 3 is a similar view of the same closed, the stem of the stud beingshown in section. Fig. t is a side view of the same and a screw-stud onwhich it is applied. Figs. 5 and 6 show the device made of wire.

The improved locking device is composed of two sheet-metal blades orshanks A A, which are hinged or pivoted to each other at the ends a toswing in substantially parallel planes and so that one blade can beswung over the other. Each blade A A is provided at about half itslength with a recess or notch B in its inner edge, the outer corners ofthe notches being slightly rounded off. The outer or free ends of theblades are rounded or bent outward, as shown at C, to facilitateinserting the finger-ball or end of the finger for the purpose ofraising and swinging the blades apart when the device is to be opened.The blade A is provided along its inner edge and at or near the free endof the blade with a shoulder or flange D, which is preferably slightlyinclined or beveled in the direction Serial No. 545,716- (No model.)

from the inner end of the blade toward the free or outer end.

The lock is applied and removed in the following manner: The screw partE of the stud F is screwed through the aperture in the shirt G (shown indotted lines) in the usual manner. The lock in open position is placedagainst the back of the shirt-bosom in such a manner that the shank orstem H of the stud rests in the notch B of the blade A, and then the twoblades are moved toward each other in such a manner that that part ofthe blade A between the hinge aand its notch B passes under that part ofthe blade A between its notch B and the hinge, and that part of theblade A between the-notch B and the free end of the blade A passes overthat part of the blade A between its notch B and the free end of saidblade, as shown in Figs. 2 and 3. The blade A in coming into thisposition passes over the flange D on the blade A, and the outer edge ofthe said blade A now rests against theinner edge of said flange, andthereby the blade A is locked in place and the two blades are lockedtogether on the stem or shank H of the stud. As part of the blade A isbelow and part of the same above the blade A the two'blades are alsointerlocked, besides being locked by the flange D.

To remove the lock the end of the finger is inserted between the bentfree ends 0 of the two blades and the blade A lifted a short distancefrom the blade A, whereupon the blades are swung from each other andinto the position shown in Fig. 1, when the lock can be removed from thestud.

As shown in Figs. 5 and 6, the device may bemade of wire, and in thiscase it can be made of a single spring-wire at, having end buttons 0. Itoperates and looks like the device shown above.

Having described my invention, what I claim as new, and desire to secureby Letters Patent, is

1. A look for screw studs composed of two shanks mounted to swing insubstantially parallel planes each shank being provided with a notch inits inner edge at about half the length of the shank and one of saidshanks being provided with a projection that can engage an edge of theother shank, substantially as herein shown and described.

together by spring tension when one shank is folded over the other,substantially as herein shown and described.

In testimony that I claim the foregoing as my invention 1 have signed myname, in presence of two witnesses, this 9th day of April, 1895.

CHARLES W. W. BALL.

Witnesses:

OSCAR F. GUNZ, N. M. FLANNERY.

